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Finding the Fourth Proportional to 72,716.74, 100,347.89 and 40,450.97

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Solution

The fourth proportional to 72,716.74, 100,347.89 and 40,450.97 is: 55,821.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,716.74 : 100,347.89 = 40,450.97 : x
  2. Step 2: Convert to fraction form
    72,716.74/100,347.89 = 40,450.97/x
  3. Step 3: Cross multiply
    72,716.74x = 100,347.89 × 40,450.97
  4. Step 4: Simplify right side
    72,716.74x = 4,059,169,487.95
  5. Step 5: Solve for x
    x = 4,059,169,487.95/72,716.74
  6. Step 6: Final answer
    x = 55,821.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.